Ernest est dupe

Bank janitor Ernest P. Worrell is called to jury duty and soon finds himself in trouble when the lookalike defendant's attorney arranges a switch and has Ernest sent to prison in his client's place. While Ernest struggles to deal with prison life, his criminal double decides to use Ernest's job at the bank as an opportunity to rob it. Will Ernest be able to break out of prison in time to stop the robbery and expose the mix-up? (texte officiel du distributeur)